<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Flow Accumulation (Mass-Flux Method)</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">18</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">O. Conrad (c) 2009</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid</td></tr></table><hr><h4>Description</h4>The Mass-Flux Method (MFM) for the DEM based calculation of flow accumulation as proposed by Gruber and Peckham (2008).

!!!UNDER DEVELOPMENT!!! To be done: solving the streamline resolution problem

References:
Gruber, S., Peckham, S. (2008): Land-Surface Parameters and Objects in Hydrology. In: Hengl, T. and Reuter, H.I. [Eds.]: Geomorphometry: Concepts, Software, Applications. Developments in Soil Science, Elsevier, Bd.33, S.293-308.
<hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Elevation </td><td>Grid (input)</td><td>DEM</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Flow Accumulation</td><td>Grid (output)</td><td>AREA</td><td></td><td></td></tr><tr><td>Slope (*)</td><td>Data Object (optional output)</td><td>G_SLOPE</td><td></td><td></td></tr><tr><td>Aspect (*)</td><td>Data Object (optional output)</td><td>G_ASPECT</td><td></td><td></td></tr><tr><td>Flow Accumulation (*)</td><td>Data Object (optional output)</td><td>G_AREA</td><td></td><td></td></tr><tr><td>Flow Lines (*)</td><td>Data Object (optional output)</td><td>G_FLOW</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Flow Split Method</td><td>Choice</td><td>METHOD</td><td></td><td>Available Choices:
[0] flow width (original)
[1] cell area
Default: 0</td></tr><tr><td>Slope</td><td>Boolean</td><td>B_SLOPE</td><td></td><td>Default: 0</td></tr><tr><td>Aspect</td><td>Boolean</td><td>B_ASPECT</td><td></td><td>Default: 0</td></tr><tr><td>Flow Accumulation</td><td>Boolean</td><td>B_AREA</td><td></td><td>Default: 0</td></tr><tr><td>Flow Lines</td><td>Boolean</td><td>B_FLOW</td><td></td><td>Default: 0</td></tr></table>(*) <i>optional</i>